Heat transferring unit



July 4, 1933. F. M. YOUNG HEAT TRANSFERRING UNIT Fi led Nov. 14, 19:52

35 37 Fla-3 INVENTOR.

dfl fil ATTORNEY July 4, 1933.

F. M. YOUNG HEAT TRANSFERRING UNIT 2 Sheets-Sheet 2 Filed Nov. 14, 1952Fi e-8 INKENTOR.

8/ ATTORNEY.

Patented July 4, 1933 PATENT OFFICE FRED M. YOUNG, OF RACINE, WISCONSINHEAT TRANSFERRING UNIT Application filed November 14, 1932. Serial No.642,533.

My invention relates particularly to the class of devices commonly usedfor car heating. It is, however, applicable to other uses whereincirculating air is heated or cooled for various purposes; or the devicemay be used for the purpose of cooling certain fluids or liquids throughthe medium of air currents or otherwise.

The object of the invention generally is to provide a device of thisclass that shall be simple in construction, pleasing in appearance andefiicient in operation.

One of the particular objects of the invention is to provide a carheater wherein the heated air current is directed downward and towardthe center of the car through the medium of .the core tubes and fins,thereby to simplify the device, reduce cost and increaseits efficiency.

Another object of the invention is to provide headers of a shape andconstruction which will be neat and pleasing in appearance, easilyconstructed and eflicient in operation.

A further object is to provide a simple and efficient joining of thetubes to the header base and of the header proper to its base, therebyto simplify the assembling and bonding operations and further tostrengthen the structure.

Another object of the invention is to provide a novel flange orreinforcin plate for the header, thereby to simplify t e bondinoperation and provide a substantial and sa. e fastening for connectionssuch as are necessary in a device of this class.

A further object of the invention is to provide raised sections in thefins between the tubes, thereby to increase the radiating surface of thefin and cause the circulating air to impinge adjacent fin surfacesalternately and more closely wipe the tube surfaces.

And further it is an object to provide a multiple of transverse rows ofair foil or rectangular tubes, the tubes of each row positioned at anangle to the general direction of air flow, preferably three transverserows of tubes. The tubes of the middle row are preferably to bepositioned to register with the space between tubes of the adjacent rowsand at opposite angle, to cause the air stream to be diverted in zigzagfashion, thereby to violently impinge the sides of the tubes.

With the above indicated objects, my invention consists of certainfeatures novel in construction, combination and arrangement of parts bywhich said objects are accomplished, as hereinafter set forth andclaimed and shown in the accompanying drawings in which:

Fig. 1 is a fractional side view of a car (in dotted lines) showing myinvention as commonly positioned therein. Fig. 2 is a fractional topview of a car (in dotted lines) showing my invention in a conventionalposition therein.

Fig. 3 is a side elevation of my improved unit.

Fig. 4 is a front elevation of my improved unit.

Fig. 5 is a top plan view of my improved header wherein a fraction isshown in section.

Fig. 6 is a fractional sectional View taken on line 6 of Fig. 4.

Fig. 7 is a fractional section taken on line 7 of F ig. 6.

Fig. 8 is a fractional section similar-to Fig. 6 except the center rowof tubes are shown as differently shaped and positioned.

Fig. 9 is a fractional section taken on line 9 of Fig. 4.

Fig. 10 is a fractional section similar to Fig. 9, differing only in theheader plate flange.

Fig. 11 is a pictorial sketch of my improved header bracket. A

Fig. 12 is a fractional section of my improved header bracket taken online 12 of Fig. 4.

By referring to the various drawings my novel structure as illustratedwill be understood as comprising a radiating unit which in its entiretyis designated by the reference character A.

By referring to Figs. 1 and 2, it will be seen that the unit A isattached to the car foot board 15 near the right hand side thereof.Preferably an electric fan designated by the numeral 16 is adapted toforce air rearwardly through the unit, the air current flowingthereafter substantially as indicated by arrows in a manner which willhereinafter appear. I

The unit is connected to the engine cooling system by means of tubes orhose connections 17 whereby part of the. circulating cooling fluid willpass through the unit A, thereby heating the air current as it passesthrough the unit.

The unit A consists of vertical tubes 18 which are in parallel relationand arranged preferably in three rows transverse to the unit, asindicated, and connected at their ends to headers which in theirentirety are designated by the reference character B in the followingmanner Referring to Fig. 9, the header bottom 20 is provided withflanged openings 21 into which the tubes 18 fit snugly, the ends ofwhich preferably protrude slightly as at 22.

The header plate 20 around its outer edge is flanged or skirted asat 23preferably opposite to flanges 21. Thus it will be seen that the tubeends can easily be guided into their respective openings, and that theycan be securely bpnded to the flanges 21 by dipping their ends into themolten bonding material without the bonding material contacting withflange 23.

Referring now to the header B, the skirt 25 is drawn so as to form arecess or ledge 26 against which the plate 20 may rest. The depth offlange 23 being greater than the recess formed by the skirt 25 wherebywhen header bottom 20 rests against the ledge 26, the flange 23 willprotrude slightly, thereby providing an ofi'set or ledge by means ofwhich the bonding material can be directed into the joint and also forminto a fillet to more securely bond the joint.

Referring now to Figs. 3, 4, 5 and 9:

It will be noted that the front 27 of the header B is a flat verticalsurface. The rear surface 28 beginning near the ledge 26 is curvedtoward the front. The sides or edges 29 also are curved in the samemanner as the rear surface, the sides and rear forming an angle thatconverges toward the center and front. The large threaded opening 30 is.located in the center of the front, therefore permitting the liquid toflow from the opening directly to all of the tubes 18 in easy curves.And at the other end of the unit the liquid will flow in easy singlecurves from the tubes to the opening 30. a

It-will be observed that the headers at both ends of the unit areexactly alike, therefore, the flow of the liquid through the entire unitfrom one opening to the other will be in easy flowing curves, thustending to increase the flow of liquid from the cooling system throughthe unit, thereby increasing the efficiency of the unit.

Before the header B is bonded to the plate emme depression 35 is formedin 27 to register with openings 34 thus to provide a pocket into whichthe bolts used may project. The bracket 31 is preferably L-shaped,thereby to fit over top of the header and provide room for air or liquiddrain plugs 36.

Three openings are provided in the extended portions of the bracket 31whereby this bracket may be riveted to the header as at 37.

I provide a raised projection 38 in the top of the header, which closelysurrounds the horizontal part of bracket 31 and an opening 39 isprovided at or near the corner of the bracket for a purpose which willhereinafter appear.

When it is desired to attach the bracket 31 to the header, bondingmaterial stops 40 are inserted in the depression 35 and a stop 41 for asimilar purpose is placed on the outside end of flange 32. The bracket31 is then placed into position and riveted to the header as at 37. Thebonding is then completed by applying heat and bonding material in amolten state in the opening 39. the object of which is now apparent.

The molten bonding material will flow between the bracket 31 and theheader. The projection 38 in addition to presenting a pleasingappearance strengthens the part of the header which is usua-lly exposedto view, and further forms a sharp offset or trench around the bracket31, thus any bonding material that may pass from under the bracket 31will accumulate in the trench, thereby strengthening the joint andavoiding marking the header by flowing bonding material.

The dissimilar material stops 40 act to prevent the molten bondingmaterial flow ing into the openings 34 and the dissimilar material 41acts as a stop to prevent the molten bonding material from flowing tothe interior of the header.

As thus illustrated and described, it will be seen that I have provideda novel, strong, simple and efficient header and header bracket.

After the bracket 31 has been bonded to the header and the, tubes 18bonded to the header bottom 20, as heretofore described, the headerskirt 25 is pressed over the flange 23 and when in an inverted positionheat and bonding material is applied to joint the bonding materialforming a fillet between the edges of the flange 23 and skirt 25, theledge 26 serving to hold the joint together and produce after bonding astrong structure of pleasing appearance.

In Fig. 10 I tom which is designated by the numeral 45, differing fromplate 20 only in that the outer flange 46 is turned in the samedirection as flanges 21. This outer flange is made to seat on ledge 26,the opposite side of which projects past the end of skirt 25 for thesame purpose as herebefore described.

One of the novel features of my invention is the construction,combination and opera tion of the core tubes and fins. The core tubes 18as shown in Fig. 6 are what is commonly termed air foil in shape. Theyare positioned preferably in three rows transverse to the unit and at anangle to the normal direction of air flow (which is indicated byarrows), and thus causes the air to impinge the surface of the tubes andcause it to be discharged to-.

ward the center of the car as indicated in Fig. 2. The tubes in thecenter row are preferably positioned to register with the space betweenadjacent tubes thus to cause air turbulence and a closer wiping of thetubes by the air.

The fins 47 (see Figs. 6 and 7) are supplied with tube flanges 48 toprovide a close fitting, suitably sized surface with which to securelybond the fins to the tube. The fins are closely spaced on the tubes andpositioned at an angle to the horizontal, as indicated in Fig. 3, therear side being low to thereby cause the air to impinge the fins and bedirected downward into the car, as shown by arrows in Fig. 1. Thuswithout the use of directing blades the heated air is directed wherebyit will be most eflicient in heating the car.

To still further increase the efliciency of the system, raises 50 arepressed into the fins, the location preferably being between the tubes,as indicated in Fig. 6, and so the raises register with each other asshown in Fig. 7,

thus causing the air to impinge the fins alternately and more closelywipe the sides of the tubes.

Fig. 8 illustrates a modified form of tube and position. It will be seenthat the tubes are arranged in three banks, as shown in Fig. 6, thecenter bank differing in that the tubes are oppositely angled. 55designates the fins which are assembled on tubes 56 and positionedsimilar to the ones shown in Figs. 2 and 3. The tubes 56 and 57 in thismodification are preferably rectangular in cross section; the front andrear rows of tubes designated by the numeral 56 are positioned similarto the front and rear rows as illustrated in Fig. 6. The middlerow oftubes 57 are, however, positioned on a reverse angle show a modifiedheader bot-- whereby the air stream will be diverted in zigzag fashionbut discharged in the direction of the center of the car, thus the airwill be caused to violently impinge the sides of the tubes and thusincrease the efliciency of the unit.

Raises 58 are pressed into the fin 55 and positioned between the sidesof the tubes 56 and 57 and register with raises in adjacent fins as andfor the same purpose shown and herebefore described in connection withFigs. 6 and 7 It will be understood that my improved heat transfer unitmay be enclosed in any form of conventional housing. For the purpose ofconvenient illustration the units shown in Figures 3 and 4 are shownwithout housings, which usually consist of a thin casing of decorativesheet steel.

It will be seen by the foregoing that I have provided a heattransferring unit which is novel, simple and efficient. It is evidentthat various modifications, such as in the position and shape of thetubes, the shape of the projections pressed into fins and various otherminor changes may be made without departing from the spirit of theinvention.

What I claim as'new and desire to secure by Letters Patent is:

1. A heat transfer unit, comprising suitable headers, flattenedcirculating tubes forming a connection between said headers, a pluralityof closely spaced fins through which said tubes extend, air circulatingmeans, said tubes and fins positioned atan angle to the normal directionof air flow whereby the air is discharged from said unit in a downwardand sidewise direction.

2. A heat transfer unit, comprisin a plurality of suitably shaped tubes,a p urality of fins closely spaced and intimately bonded to said tubes,suitable headers and means for circulating heated liquid through saidtubes and headers, means for moving an air current between said tubesand fins, said tubes and fins positioned at angles to the normaldirection traveled by the air current, thereby to cause the air toimpinge said fins and tubes and discharge the heated air downward andsidewise, as and for the purpose specified.

3. A heat transfer unit, comprising a plurality of suitably shaped tubesin parallel relation, a plurality of fins closely spaced and intimatelybonded to said tubes, suitable headers adapted to direct heated liquidto and from said tubes, means for moving an air current between saidfins and tubes, said tubes at the rear of said unit positioned at anangle and said fins positioned on said tubes at an angle, thereby todischarge said air current downward and sidewise.

4. A heat transfer unit, comprising suitable headers and a pluralit ofsuitably shaped tubes therebetween an positioned in parallel relation, aplurality of radiating fins closely spaced and intimately bonded to saidtubes, air circulating means, said tubes arranged in three separate rowstransverse to said unit, the tubes of the center row positioned toregister with the space between tubes of the adjacent rows and arrangedat alternate angles, thereby to cause the air to impinge the sides ofsaid tubes alternately.

5. A heat transfer unit, comprising two headers and a plurality of tubesin parallel relation therebetween, said headers each having flat frontsand circulating liquid connections in the center thereof, the rear andsides of said header having curves which converge over the tube endstoward the center and front, whereby the circulating liquid will passthrough said header to and from said tubes in easy flow curve lines. 7

6. A heat transfer unit, comprising a plurality of tubes in parallelrelation, a header bottom intimately bonded to said tubes by means ofprojecting flanges, an outwardly projecting flange on the perimeter ofsaid header bottom, a header the front of which is flat, the rear andsides having curves which converge toward-the center and front thereof,a skirt around the perimeter of said header formed by an outwardlyprojecting flange, said skirt adapted to fit snugly within said headerbottom flange, said skirt and header bottom flange intimately bondedtogether thereby forming a simple, substantial bonding between thetubes, header bottom and header.

7. A heat transfer unit, comprising a plurality of tubes in parallelrelation, a header bottom intimately bonded to said tubes throughoutwardly projecting flanges, a

flange on the perimeter of said header bottom, a header, the front ofwhich is flat, the rear and sides having curves which converge towardthe center and front thereof, a skirt around the perimeter of saidheader formed by an outwardly projecting ofi'set, said skirt adapted tofit snugly over said flange but short of the flange length when saidflange is seated against said ledge, said skirt and flange intimatelybonded together, thereby forming a simple substantial joining betweenthe tubes, header bottom and header.

8. A heat transfer unit, comprising a suitable bank of tubes and headersat the ends thereof, a reinforcing plate adapted to fit over the frontof said header, threaded openings in said plate, depressions in saidheader registering with said openings, thereby forming a pocket intowhich the end of a bolt may project, means for intimately bonding saidplate to said header.

9. A heat transfer unit, comprising a suitable bank of tubes, headers atthe ends thereof, an L-shaped reinforcing plate adapted to fit over thefront and top of said header, an opening at the bend of said plate, araised projection in said header adaptedto closely surround said plateforming a depression therefor, said plate bonded to said header byapplying molten bonding material to said opening whereby said moltenbonding material will intimately bond said plate to said header, thesurplus of which will accumulate between said raised projection and saidplate.

In witness whereof, I hereunto aflix my hand this fourth day ofNovember, 1932, at Racine, Wisconsin.

FRED M. YOUNG.

